Well i'm new to Construct but not new to engine's I would like like the following changes:
Support for .3ds, .blend, .dae basically most of the 3D formats
Soft shadows when the light object and shadow caster behaviors are on and not so big shadows either
3D positional camera
Camera object that can be moved with a sequence editor in other words. I want a cutscene editor.
Networking by default without having to use pyhton
Better Python support (Or better yet LUA)
Vertex Shading Support (I'm not going to tell you how important that is)
Effects like flame should be able to be attached to objects (Look at the Ethanon Engine)
Light to already be rendered as soon as you drag it to the screen. (Leadwerks, Maratis 3D)
Better physics support so you can create a ball or complex objects without having to go in the colision editor and dragging it around.
If a light and a bumpmap are both on the screen I want the shine of the bumpmap to go to the light's position and for the reflection to pass onto other bumpmaps if they collide.
I think that's about it.
Oh and I would like to be able to out animated 3D objects in construct
If it had these thing's then I would definatly buy it.